Himchan and Kim Nella were best friends and part of a school gang during their middle school days. Along the way, they developped feelings for each other and decided to date. In the 9th grade, an event that will question their trust for each other tore them apart. As the two went their separate ways, Himchan had no idea that Nella was pregnant with his child. 3 years later, they unexpectedly end up being in the same school and same classes.